Simon Moore, CBI international director, said: “The figures in this report show just how close the economic ties between the United States and the United Kingdom are, with both countries benefiting hugely from these links.

“The unique trading relationship between our two countries continues to thrive. With the US economy picking up, and TTIP (Transatlantic Trade and Investment Partnership) negotiations progressing well, companies on both sides of the Atlantic recognize the opportunities for good business and are pursuing them with vigour.”

Katja Hall, CBI deputy director general, said: "The figures in this report demonstrate that the relationship that exists between our two countries is significant, however, at a time when sustained global economic growth seems tangibly close, the United States represents a growing opportunity for British businesses."